Weil-McLain 88 Water and Steam Boilers — Series 2 — For Gas, Light Oil, & Gas/Light Oil-Fired Burners

Burner specifications and settings

Table 1

Burner data — Natural gas — Modulating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Boiler

 

Burner

Pressure

Manifold

Gas Pressure Required at

Gas Pilot

Combustion

 

Combustion

 

 

Servo Motor Cam

 

 

Model

 

Model

Drop Thru

Pressure

Gas Control Inlet

Pressure

Head

 

Air Settings

 

 

Position Settings

 

 

Number

 

Number

Gas Train .

 

 

 

 

Setting

 

 

 

 

 

 

 

 

 

 

Min

Max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inches W.C.

Inches W.C.

Inches W.C

Inches W.C

Inches W.C.

 

 

 

 

 

 

 

 

 

 

488R

 

RS28/M

0.75

3.30

4.05

14

5.00

3

27

 

52

0

22

90

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

488

 

RS28/M

0.75

3.60

4.30

14

5.00

4

27

 

52

0

22

90

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

588

 

RS38/M

1.30

3.70

5.00

14

5.00

2

17

 

70

0

25

90

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

688

 

RS50/M

1.83

2.90

4.73

14

2.70

3

16

 

65

0

18

90

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

788

 

RS50/M

2.40

3.50

5.85

14

2.50

4

28

 

85

0

20

90

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

888

 

RS70/M

2.98

3.70

6.63

14

8.25

3

2.5

 

7.0

—

—

—

130

0

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

988R

 

RS70/M

3.16

3.87

7.03

14

8.25

4

2.5

 

7.5

—

—

—

130

0

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

988

 

RS70/M

3.16

4.10

7.28

14

8.25

5

2.5

 

7.5

—

—

—

130

0

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1088R

 

RS70/M

3.00

4.65

7.65

14

6.50

8

3.0

 

8.5

—

—

—

130

0

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1088

 

RS70/M

3.00

4.90

7.90

14

6.50

9

3.0

 

8.5

—

—

—

130

0

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1188

 

RS100/M

3.80

3.10

6.90

14

6.50

4

2.5

 

6.0

—

—

—

130

0

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1288

 

RS100/M

3.82

3.63

7.45

14

7.50

4

3.0

 

6.5

—

—

—

130

0

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1388

 

RS100/M

2.41

4.50

6.91

14

7.60

3

2.5

 

9.0

—

—

—

130

0

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1488

 

RS130/M

3.76

3.30

7.01

14

7.80

5

2.0

 

7.0

—

—

—

130

0

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1588

 

RS130/M

4.09

3.50

7.59

14

7.20

7

2.5

 

7.0

—

—

—

130

0

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1688R

 

RS130/M

3.19

3.45

6.64

14

7.20

8

2.5

 

8.5

—

—

—

130

0

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1688

 

RS130/M

3.19

3.70

6.89

14

7.20

9

2.5

 

8.5

—

—

—

130

0

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1788

 

RS130/M

3.70

4.80

8.50

14

7.20

9

2.5

 

9.0

—

—

—

130

0

55

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1888

 

RS190/M

3.71

3.50

7.21

14

5.00

0

0.5

 

3.8

—

—

—

130

0

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes for Table 1, Table 2 and Table 3

1.Burner capacities listed for elevations up to 2,000 feet. For higher eleva- tions, consult local Weil-McLain distributor/agent or sales office.

2.Gas ratings based on natural gas with heating value of 1,000 Btu per cubic foot and specific gravity of 0.60. Gas burners for other gases are available. Consult local Weil-McLain distributor/agent or sales office.

3.Boiler-burner unit to be adjusted to achieve +0.10 inches W.C. pressure at the flue collar, resulting in positive pressure in firebox as listed.

4.Minimum gas pressures listed are subject to variations due to job condi- tions. Gas burners for other gas pressures are available. Consult local Weil-McLain distributor/agent or sales office.

5.All settings and pressures shown are for initial start-up. Final values should be confirmed with combustion analysis.

6.Gas train sizes for models 488R to 1288 are based on a supply pressure to the regulator of 7 inches W.C. Gas train sizes for models 1388 to 1888 are based on a supply pressure to the regulator of 12 inches W.C. Optional trains are available for other pressures upon request.

7.Gas Control Systems:

•OO: On - Off operation. Single-position air damper

•LHL: Low-high-low-off firing conditions – two-position air and fuel controlled by separate motor, open damper pre-purge.

•MOD: On - Off operation with proven low fire start and full modulating firing conditions. Proportional motor drives fuel metering valve and combustion air damper according to firing conditions; open damper pre-purge.

8.120/60/1 control circuit is used for all burners. Control circuit trans- former is available as an option.

9.Airflow safety switch is standard for all gas and combination gas/light oil units.

10.Burners will be completely assembled and wired (except gas train) and factory test-fired. Burners listed by Underwriters Laboratories, Inc., state of Connecticut, Fire Marshal state of Massachusetts, city of New York MEA, and others.

11.Special controls can be provided to meet other code requirements not listed. Consult your local Weil-McLain distributor/agent or sales office. Electric gas pilot will be furnished as standard equipment on all gas and combination gas/light oil units.

12.Direct spark ignition is standard for light oil units. Direct spark ignition is available as an option for combination gas/light oil units. Consult your local Weil-McLain distributor/agent or sales office.

13.All 3 phase models require a separate 120/60/1 control voltage supply.

14.Combustion Controls:

•Siemens LFL 1.335 flame safeguard control monitors the oil or gas burner flame with visual diagnostic window, provides pre-purge and post purge, provides switching necessary to allow firing rate motor to be driven to both low fire and high fire positions, prevent start up if pre-ignition interlocks are open and has low fire start proven circuit. In the event pre-ignition interlock circuit or running interlock circuit does not “prove”, system will lock out on safety. Ultra violet sensitive electronic flame detector is standard.

15.All units require a single SPDT controller for LHL firing rate opera- tion.

16.Modulating units 488R to 788 require a 120v bumping type signal or PID control for modulation.

17.Modulating units 888 to 1888 require a 4 – 20mA, 0 – 10vdc or 135 ohm signal for modulation.

18.Motor relay or contractor will be furnished on all units.

2

Part No. 550-142-025/0508

Page 1 Page 3
Page 2
Image 2
Weil-McLain RS dimensions Burner specifications and settings, Burner data Natural gas Modulating
Page 1 Page 3

RS specifications

Weil-McLain RS, a part of the Weil-McLain family of heating solutions, is known for its reliability and efficiency in residential and commercial heating applications. This product reflects years of engineering expertise and commitment to quality, offering homeowners and business owners an effective solution to heat their spaces.

One of the main features of the Weil-McLain RS is its robust design. Built to withstand the demands of various heating environments, the RS series boasts a cast iron construction that ensures durability and longevity. Cast iron is excellent for retaining heat, enabling the boiler to provide consistent warmth even in cold conditions.

Additionally, the Weil-McLain RS is equipped with an efficient heat exchanger. This component allows for optimal heat transfer, maximizing energy use while minimizing wastage. The advanced design of the heat exchanger also contributes to the boiler's quick response times and enhances overall heating performance.

The RS series incorporates advanced technologies, including multi-stage firing options. This feature allows for precise control over heating output, adapting to varying heating demands. Such adaptability not only improves comfort but also enhances energy savings, as the system can operate at lower capacities during milder conditions.

User-friendly controls are another hallmark of the Weil-McLain RS. The intuitive interface and programmable settings empower users to easily adjust temperatures according to personal preferences. This level of customization ensures a comfortable living environment while allowing homeowners to manage energy consumption effectively.

Furthermore, the Weil-McLain RS is designed with easy maintenance in mind. Access to critical components is straightforward, and the system is compatible with a range of accessories that can enhance its performance and efficiency. For instance, optional components can include water heating capabilities, making the RS versatile for both space heating and domestic hot water needs.

Safety is also a priority in the design of the Weil-McLain RS. The boiler includes multiple safety features, such as pressure relief valves and safety shutoff controls, to ensure secure operation.

Overall, the Weil-McLain RS stands out in the market for its combination of reliability, efficiency, and user-friendly design. Whether used in a residential or commercial setting, it delivers performance you can depend on, making it an excellent choice for anyone seeking an effective heating solution.
Top Page Image Contents